Improvement in bone-grinding mills



T. 0. CUTLER. Bone-Grinding Mill.

No. 212,838. Patented Mar. 4,1879.

ATTORNEYS.

UNITED Srrrrns PATENT Gunmen.

THOMAS O. CUTLER, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO HIMSELF ANDADOLPH HIRSH,

or new YORK, N. Y.

Specification forming part of Letters Patent No. 212,838, dated March 4,1870; application filed August 20, 1878.

To all whom it may concern:

Be it known that I, THOMAS O. CUTLER, of Jersey City, in the county ofHudson, State of New Jersey, have invented a new and ImprovedBone-Grinding Mill, of which the following is a specification:

In the accompanying drawings, Figure 1 represents a vertical centralsection of 1nyin1 proved bone-grinding mill, and Figs. 2 and 3 arerespectively a top view of the revolving runner-section and a bottomview of the stationary head-section.

Similar letters of reference indicate corresponding parts.

The invention relates to an improved mill for grinding bones,phosphates, and similar articles in superior and effective manner; andit consists of a fixed top section or casing, with notched concentricand tapering ridges, in combination with a revolving runner having shortinner beaters, longer intermediate beaters, and an outer notched andcircular ridge, the substances to be ground being passed from the centeroutward, and discharged in ground state between the outer ridge of thetop casin g and the outer ridge of the runner.

Referring to the drawings, Arepresents the supporting-frame of myimproved mill for grinding bones, phosphates, and other substances. Tothe top of frame A is attached, in any suitable manner, a fixed topsection or casing, B, which has a center opening for charging the millwith the substances to be ground. The top section, B, is provided withconcentric ridges B, that are made tapering from their broader base totheir narrower tops, and provided with alternating notches a at bothsides, said notches forming teeth that take up the substances and exposethem to the action of the beaters of a revolving runner, G. The spindleof the revolving runner O is supported in a bottom step, b, of frame A,and in a bearing, (1, of a stationary yoke, d, at the top of the fixedtop section, B. The runner is revolved by suitable power, and adjustedcloser to or farther from the fixed section by any well-known andapproved mech anism.

The revolving runner O is provided with short inner beaters, e, oftriangular and up ward-tapering shape, which work in conjunction withthe notched inner ridge of the top. The heaters e are equidistant fromeach other and from the spindle, and exert a breaking action on thesubstances fed to the mill. The broken-up parts pass then, owing to thecentrifugal force imparted by the speed of the revolving runner,outward, and are acted up-v on by intermediate but longer beaters, f,that are also of tapering triangular shape, and arranged equidistantfrom the center, but intermediately between the inner beaters. Thelonger heaters work in conjunction with the adjacent notches of theinner and middle ridges of the top section, and reduce the alreadybroken-up substances to smaller size. These coarsely-ground particlespass then toward the circumference of the runner, and are taken up bythe slanting teeth of an outermost notched ridge, g, that corresponds inshape to the ridges of the top section, and works in conjunction withthe notched sides of the intermediate and outermost ridges of the same.The finely-ground particles pass finally out at the circumference of therunner, and are conducted by a hopper-shaped trough, or in othersuitable manner, to a suitable receptacle.

The runner may be revolved in such a manner that the heaters of therunner work against the teeth of the top section and break up and grindthe substances; or the runner may be run backward, so as to crush thesubstances; or the runner may be run in the direction described, but thenotches of the ridges of the top section arranged in opposite directionto that shown.

In all cases the substances are first broken up, then the broken-upcoarse parts reduced to a finer state, and finally ground up into finestate and passed out at the circumference of the mill.

A powerful, rapidly-working, and hi ghly-efi fective grinding-mill forbones, phosphates, with a runner, 0, having fixed inner shorter andmineral substances is thus obtained. heaters, 6, intermediate fixedlonger heaters, Having thus fully described my invention, I f, andouter-ridge teeth, 9, arranged as shown claim as new and desire tosecure by Letters and described, for the purpose specified.

Patent- In a mill, the fixed top section or casing, CUTLER B, having acentral opening to receive grist, Witnesses: and concentric ridges B,the latter provided PAUL GOEPEL, With a double row of teeth, incombination 0. SEDGWIOK.

